Automation System
A disadvantage of Numerical Control (NC) is:

one operator is needed for each machine.
the computer is not reliable
the tape and tape reader are not reliable
the machine tool can easily overheat
None of these

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Automation System
The main function(s) of computer in CAD is/are

To relieve the designer from routine repetitious tasks.
To enhance the analytical and logical power of the designer
None of these
To serve as an extension to the memory of the designer
All of these

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Automation System
What is the process lag?

None of these
The time it takes for the mass of the process to respond to an input change.
All of these
The lag in the error signal when the setpoint is changed.
The time it takes for the sensor to respond to a changed.

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